ICP-OES Wavelength calibration solution 15 components: Al 5ug/ml As 5ug/ml Ba 5ug/ml Cd 5ug/ml Co 5ug/ml Cr 5ug/ml Cu 5 ug/ml Mn 5ug/ml Mo 5ug/ml Ni 5ug/ml Pb 5ug/ml Se 5ug/ml Sr 5ug/ml Zn 5ug/ml K 50ug/ml in HNO3 5% 1 * 1 Pack.